Elastic File Storage (EFS) supports two access methods: FSX and NFS. The recommended scenarios and performance differ among these access methods. This topic helps you choose the most suitable access method for your actual scenario based on the following information.

Type

FSX

NFS

Type	FSX	NFS
Recommended scenario	The performance of a single NFS client cannot meet the business requirements. Business operations depend on directory-level permissions management. The client cache acceleration feature is expected to be used.	The performance of a single NFS client can meet the business requirements. The client is not included in the FSX compatibility list..
Operating system	Only Linux is supported. For usage restrictions and operating systems supported by the FSX client, see FSX client overview.	Linux and Windows are supported. For the Windows operating system, only NFSv3 is supported, which is not recommended unless necessary.
Access protocol	Self-developed high-performance file storage protocol	NFSv3 and NFSv4.1
POSIX compatibility	Fully compatible	Fully compatible
Single-client performance	8 GB/s	2 to 3 GB/s
Single-client cache performance	45 GB/s (beta)	Not supported
Mount entry	Access point	Mount point
Client hot upgrade	Supported	Not supported
Enterprise features	Directory-level user permissions management based on IAM Client cache	Not supported

tip

For more information about EFS access methods, see Choosing the right client.

Last updated: 2026.07.24 10:53:34

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